Patti Davis says she's received hundreds of letters of support following reports of a new Will Farrell comedy that will make fun of her father President Ronald Reagan's struggle with Alzheimer's disease.

"Thank you to everyone who has sent posts to my website regarding the Will Ferrell film and the 'humorous' depiction of Alzheimer's," Davis wrote Friday on her Facebook account.

"You have written about your personal situations and heartbreak with this disease and I am incredibly moved. I'm doing my best to read all of them — there are hundreds, and still coming.

"Please know my prayers are with all of you who are dealing with the devastation of Alzheimer's and other forms of dementia."

One supporter, Mark Wahlstrom, president of the Wahlstrom & Associates legal firm, wrote to Davis: "Dealing with it with a family member now and nothing could possibly be less humorous. I hope they lose their shirts on this project."

As Variety reported this week, Farrell — who famously played portrayed George W. Bush on "Saturday Night Live" — is taking on a new script called "Reagan," written by Mike Rosolio, head writer of the TV series, "Lemmings."

The story opens during Reagan's second term "when he falls into dementia and an ambitious intern is tasked with convincing the commander-in-chief that he is an actor playing the president in a movie," Variety says.

On Thursday, Davis penned an open letter to Ferrell in The Daily Beast, stating: "Perhaps for your comedy you would like to visit some dementia facilities," Davis told Ferrell. "I have — I didn't find anything comedic there, and my hope would be that if you're a decent human being, you wouldn't either."

Patti Davis says she's received hundreds of letters of support following reports of a new Will Farrell comedy that will make fun of her father President Ronald Reagan's struggle with Alzheimer's disease.